Never cooked one that small, but the snake method should work fine. Cook to an IT of about 170*-180*, mine usually takes 4 hours, your 5 pounder probably much less. Then wrap, preferably in butcher paper, foil if you must and continue cooking until it probes tender with an IT in the 200*-210* range, again mine usually takes a couple more hours. The IT's are just reference point, cook until it is probe tender. PS: I cook ate about 300*-310* at the cooking grate.
Edit: FYI here is my last one:
Weber 26.75 OTG w/CI grates & SJ/WSM Mini
Home built 24"x72" reverse flow stick burner trailer with 18"x44" grill w/CI grates and upright SS gas oven/smoker.
Home built 48" fire pit with a 30"x30" Santa Maria style ranch grill.
Home built lump charcoal retort, iGrill & a bunch of other cooking toys.
Last edited by dwfisk; 10-19-2013 at 08:47 AM..